David R. Heiden is escorted into the courtroom during his initial court appearance at the county courthouse Monday, May 6, 2019, in Manitowoc, Wis. Joshua Clark/USA TODAY NETWORK-Wisconsin Joshua Clark, Joshua Clark/USA TODAY NETWORK-W

A man in the gallery is restrained and escorted out of the courtroom after approaching defendant David R. Heiden and making threatening remarks during the initial court appearance at the county courthouse Monday, May 6, 2019, in Manitowoc, Wis. Joshua Clark/USA TODAY NETWORK-Wisconsin Joshua Clark, Joshua Clark/USA TODAY NETWORK-W

A man in the gallery is restrained and escorted out of the courtroom after approaching defendant David R. Heiden and making threatening remarks during the initial court appearance at the county courthouse Monday, May 6, 2019, in Manitowoc, Wis. Joshua Clark/USA TODAY NETWORK-Wisconsin Joshua Clark, Joshua Clark/USA TODAY NETWORK-W

David R. Heiden listens to the public defender during his initial court appearance at the county courthouse Monday, May 6, 2019, in Manitowoc, Wis. Joshua Clark/USA TODAY NETWORK-Wisconsin Joshua Clark, Joshua Clark/USA TODAY NETWORK-W

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MANITOWOC - More details were released about the death of 2-year-old Gilbert A. Grant II in an amended criminal complaint that was filed May 5.

According to the document, Grant died April 26 from internal bleeding after being spanked, hit with a sandal and shaken by 28-year-old David R. Heiden.

The death occurred while the boy's mother, 27-year-old Rena L. Santiago, and her roommate, 25-year-old Bianca M. Bush, were out shopping, according to the complaint. Heiden was at the Two Rivers apartment with Grant and the 1-year-old son he has with Bush. According to the criminal complaint, Heiden told police he got mad Grant wasn't going to bed and spanked him several times.

The document states, "Heiden said that (Grant) was still rolling around and whimpering so he went in the fourth time, picked (Grant) up by the sides of his torso and forcefully shook him hard while yelling at him to go to sleep."

When Bush and Santiago came home, Bush went into the bedroom where Grant was to check on him and she saw he was dead. They called 911 after calling two other friends. Heiden and his son were not in the apartment when they arrived.

Gilbert A. Grant II(Photo: Provided)

Officers found the boy laying on a futon bed wearing a diaper and an infant body suit with bruising all over his body, including the entire right upper hip and thigh area and on his buttocks and back area, according to the complaint.

Police found Heiden later that night and brought him in for questioning. The complaint states Heiden cried during his interview and said he never meant for anything like this to happen.

Heiden and Bush have a 1-year-old son together. According to the criminal complaint, Heiden said he and his son moved out of the apartment in 2018 after an incident that caused Bush to strike their child, causing a large red welt on his back.

David R. Heiden(Photo: Courtesy of Manitowoc County Sheriff's Office)

He said he and Bush have joint custody of the child, but agreed Bush could only spend time with their son if Heiden was present.

The criminal complaint details how Santiago, Bush and Heiden would all discipline Grant by spanking or hitting him with various objects. They would also force food down his throat, make him vomit and then force him to eat the vomit. The document also indicates Santiago knew of the punishments doled out by Bush and Heiden and approved of them.

According to the document, Santiago engaged in prostitution, often in the same bed she shared with Grant, and Bush would take the money she earned from those encounters.

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The house where roommates Rena L. Santiago, Bianca M. Bush and David R. Heiden resided on the east 2100 block of River Street Thursday, May 2, 2019, in Two Rivers.(Photo: Joshua Clark/USA TODAY NETWORK-Wisconsin)

Heiden was in court Wednesday morning for an initial appearance at the Manitowoc County Courthouse. He waived his preliminary hearing and an arraignment is scheduled for 9:15 a.m. May 24.

He is charged with repeated physical abuse of a child causing death, repeated physical abuse of a child causing bodily harm, chronic neglect of a child, possession of THC as party to a crime and possession of drug paraphernalia as party to a crime.

Santiago and Bush are due in court at 1:30 p.m. Monday for their own initial appearances.

Santiago is charged with repeated physical abuse of a child causing death, repeated physical abuse of a child causing bodily harm, chronic neglect of a child, prostitution, possession of THC as party to a crime and possession of drug paraphernalia as party to a crime; and Bush is charged with two counts of repeated physical abuse of a child causing bodily harm, child abuse, chronic neglect of a child, allow use as place of prostitution, pandering, possession of THC as party to a crime and possession of drug paraphernalia as party to crime.

Do you have information to share about this case? Contact Alisa Schafer at 920-686-2105 or aschafer@gannett.com. Follow her on Twitter at @AlisaMSchafer.